/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.group;

import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;

import java.util.Collections;
import java.util.Iterator;
import java.util.concurrent.TimeUnit;

final class VoidChannelGroupFuture implements ChannelGroupFuture
{

    private static final Iterator<ChannelFuture> EMPTY = Collections
            .<ChannelFuture> emptyList().iterator();

    private final ChannelGroup group;

    VoidChannelGroupFuture(ChannelGroup group)
    {
        this.group = group;
    }

    @Override
    public ChannelGroup group()
    {
        return group;
    }

    @Override
    public ChannelFuture find(Channel channel)
    {
        return null;
    }

    @Override
    public boolean isSuccess()
    {
        return false;
    }

    @Override
    public ChannelGroupException cause()
    {
        return null;
    }

    @Override
    public boolean isPartialSuccess()
    {
        return false;
    }

    @Override
    public boolean isPartialFailure()
    {
        return false;
    }

    @Override
    public ChannelGroupFuture addListener(
            GenericFutureListener<? extends Future<? super Void>> listener)
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture addListeners(
            GenericFutureListener<? extends Future<? super Void>>... listeners)
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture removeListener(
            GenericFutureListener<? extends Future<? super Void>> listener)
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture removeListeners(
            GenericFutureListener<? extends Future<? super Void>>... listeners)
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture await()
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture awaitUninterruptibly()
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture syncUninterruptibly()
    {
        throw reject();
    }

    @Override
    public ChannelGroupFuture sync()
    {
        throw reject();
    }

    @Override
    public Iterator<ChannelFuture> iterator()
    {
        return EMPTY;
    }

    @Override
    public boolean isCancellable()
    {
        return false;
    }

    @Override
    public boolean await(long timeout, TimeUnit unit)
    {
        throw reject();
    }

    @Override
    public boolean await(long timeoutMillis)
    {
        throw reject();
    }

    @Override
    public boolean awaitUninterruptibly(long timeout, TimeUnit unit)
    {
        throw reject();
    }

    @Override
    public boolean awaitUninterruptibly(long timeoutMillis)
    {
        throw reject();
    }

    @Override
    public Void getNow()
    {
        return null;
    }

    @Override
    public boolean cancel(boolean mayInterruptIfRunning)
    {
        return false;
    }

    @Override
    public boolean isCancelled()
    {
        return false;
    }

    @Override
    public boolean isDone()
    {
        return false;
    }

    @Override
    public Void get()
    {
        throw reject();
    }

    @Override
    public Void get(long timeout, TimeUnit unit)
    {
        throw reject();
    }

    private static RuntimeException reject()
    {
        return new IllegalStateException("void future");
    }
}
